General :: USB To Serial Converter Not Working For 115200 Baud Rate But Good For 9600
Oct 25, 2010
I am using openSUSE 11.3 , 32bit.I do the appropriate setting in 'minicom' application.I have two devices 'a' giving message at debug port at 9600 baud while 'b' at 115200 baud..Both 'a' & 'b' work fine when connected to serial port of computer.'a' works well if I connect it to serial to USB adapter which is plugged into USB port of computer.In case of 'b' , the above method yields failure.Do I have to set anything for device /dev/ttyUSB0 ?
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Oct 30, 2010
I am using the command:
Code:
sudo stty -F /dev/ttyUSB0 115200
to try and change the baud rate from 9600 to 115200 on device USB0, but I keep getting this error.
Code:
stty: /dev/ttyUSB0: unable to perform all requested operations
ttyUSB0 is not locked, and I know it is capable of 230400 b/s so I know it should handle 115200 just fine.
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Nov 2, 2010
The /etc/inittab file is configured as the following.
Code:
# vi /etc/inittab
/sbin/getty -l /bin/login /dev/ttyS0 9600 vt100
It always makes the baud rate 9600.How can I make the baud rate be configured automatically according to the terminal's baud rate? Can I?
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Sep 26, 2009
I use Minicom on the recenet Ubunto Linux and have a single USB 2 serial device and my Minicom doesn't have 57600 for selection.
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Sep 6, 2009
I am writing a simple serial port programing based on s3c2410. However, I found that I cannot change serial port attributes including baud rate using tcsetattr. I think i have follow "Serial Programming Guid for POSIX operating system" strictly, but why it does not work? the baund rate cannot be changed to 115200?
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Jun 23, 2011
I'm trying to do something very old, but for me very necessary. I am trying to get dial in acces via a modem that is connected via a usb <-> serial converter. I am running F14. The serial port is OK. I can run minicom and access the modem and even interogate it. What I am unable to do is to get the computer to answer. Much has changed and I have not dealt with upstart and things like that (if indeed that is needed).
I believe I"m OK with 115200 communicating with the modem. I know the device is /dev/ttyUSB0.
Is ther someone who can fill in the blanks? Or, point me towards really good documentation that explains how to do this.
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Apr 30, 2011
You may all know about Total Video Converter, Any Video Converter and such used in Windows, where you chose codecs, like i want to convert to mp4 for my phone.
But.. there's one specific thing I'm looking for that most don't seem to have. Cutting.
I need for example, to cut from 24:00 to 30:00, that is the only part i want cut and converted to mp4 ready for my phone.
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Jan 2, 2015
I have some USB-Serial converters and when I connect any of them for the first time a /dev/ttyUSB0 node is created.
If I disconnect the device and then reconnect it then a /dev/ttyUSB1 node is created y I do the same again (reconnect) a /dev/ttyUSB2 node is created...
This is annoying because if mostly use only one converter at a time and because of the device node changing I have to reconfigure my software.
To reset the numbering of the device node I can force the reload of the usbserial module but before (I don't know when before) this was not necessary.
I have also checked if the device is being in use before disconnecting it (with lsof) and the device is not being used.
I'm running Debian Testing amd64 with KDE.
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Dec 16, 2009
I am trying to connect to a cisco console port using the usb to serial converter. I am using minicom and I changed me setting to reflect the USB converter cable, but it isn't working. I have set my baud rate to 9600, 8 data bits and no parity. Minicom acts as if it is connected (it doesn't give any errors), but there is nothing on the screen and nothing happens when I type. Also, I use the tail command and it sees the usb connector connected when I unplug it and plug it back in.
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Feb 12, 2010
I have a Macbook Pro 2,66 Ghz (June 2009) and i also use a Samsung T240HD-Screen. The Mac has a MiniDisplayport und i use a converter to HDMI. I don't get a signal on the external screen. It is displayed in the X-Server-Settings and i can configure it (Resolution, Twinview, Position and so on) but when i go to the GPU-Section all the Information in the section of den T240HD-screen is "unknown". Nvidia Driver Version: 190.53
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Aug 12, 2010
Open office pdf converter not working. I have installed openoffice 3 and python module UNO on the server and i want to convert document file to pdf format.
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Jan 13, 2010
I am trying to get two way serial communications going between a Windows XP system and a Linux system (RHEL 5).I have /sbin/agetty -L 9600 ttyS0
in /etc/inittab. I am using a generic USB to serial adaptor on Windows (Unitek) and a null modem cable. I have putty configured for 9600 baud, 8 bits, no parity, one stop bit, no flow control.I get the login prompt from agetty in the putty window but input does not work; I see weird characters in the putty screen. I can echo output into the device from windows and see it, but
cat < /dev/ttyS0. just prints out weird characters from what I type.
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Feb 3, 2010
i'm running Opensuse 11.2 with Gnome, and installed the "nautilus-image-converter" packages.
but it doesn't work on my system...
Is it the same thing for other GNome users ?
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May 15, 2011
i am using Ubuntu 11.04 on my computer system. I urgently need a good video converter for converting videos.I have already installed FFmpeg and men-coder,Winff etc. The problem is each has its own drawback.For instance ffmpeg cannot convert a .avi to .3gp with audio working. My preferences are the converter should be user friendly, should support all popular video formats.
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Jan 15, 2011
I desperately want to get away from DOS and Windows, change to Linux... however I need 6400 baud for a special dongle. I found out my PC is working in Windows perfect at this baudrate, but in Linux it is unsupported.termios.h seems to have no support. I'm programming in C++ and want to use 6400 baud.
With setserial software I can have a divisor of 18, then the baudrate = 115200/18 = 6400. However, I want to use it in my programs (G++) and maybe also in Dosbox until my program is completely converted to Linux... however, if Linux does NOT support 6400 baud this operating system I have to stick to MFC, which is terrible.
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May 15, 2010
after installing the OS my mouse was not working. After searching in net for a day, I made it working. Shall give the details hereIf its a repeat thread please ignore it.1. Go to Terminal.2. Login as root.3. su -c 'yum install -y system-config-display'This step will take some 2 to 5 mins 4. su -c 'system-config-display --reconfig'After Fedora 9/10, the xorg.conf is not available and it uses HAL to detect the hardwares. The above steps create the config file.
5. su -c 'cp /etc/X11/xorg.conf /etc/X11/xorg.conf.bak'
back up
6. su - -c 'gedit /etc/X11/xorg.conf'
[code]....
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Mar 8, 2010
I have RHEL 5.3 installed on HP ProLiant DL320 Generation 5 but i cant get serial port workingdmesg | grep ttyserial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
setserial -g /dev/ttyS[0123]
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
[code]...
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Dec 16, 2010
I picked up as Dynex usb2serial converter to use with my cisco router/switch. The dongle works fine if plugged into a windows box & puTTy, but I cannot get it to work with Fedora 14. When I try to use cute, mini or command line it tells me it cannot open the connection. Here is the output from lsusb and dmesg. susb output:
[code]....
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Apr 20, 2011
I've just had to change the MOBO and trying to get the serial port working, I see from previous posts there are some problems lurking in the past.
setserial -g /dev/ttyS*
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: unknown, Port: 0x02f8, IRQ: 3
/dev/ttyS2, UART: unknown, Port: 0x03e8, IRQ: 4
/dev/ttyS3, UART: unknown, Port: 0x02e8, IRQ: 3
but I'm not seeing anything from a GPS receiver in NMEA at 4800 no par 1 stp I know that was working about a year ago. I think udev was not helping ,as I was getting permission denied to the com port, I added myself to group dialout. and no message on startup now
I need to be able to talk to a piece of kit with 9600 baud and nothing. I have win32 s/w to drive it , but it falls over in wine. My laptop still has win7 on it in a tiny partition but no 9w d connector and I'm waiting for a USB converter cable. Too many variables ! I'd forgotten all the hassle of having to install drivers just to get basic things running. But as the stupid thing couldn't manage using the driver for my NIC, I was stuck with hyper-terminal, and nothing from the GPS board @4800 or another piece of equipment running at 9600. I suspect the com port on the new mobo doesn't wan to play
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Jul 8, 2010
I'm new to ubuntu. I'm trying to get my US Robotics external serial modem working so I can use Ubuntu.
I copied
wvdial & dependencies:
libuniconf4.6
libwvstreams4.6-extras
libwvstreams4.6-base
to a flash drive.
How do I get them to /var/cache/apt/archives? I tried to copy and drag&drop wont work.
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May 13, 2010
I am using linux 2.6.20 from ltib-mpc8313erdb-20070824 on my development board having MPC8313 powerpc processor. Whenever I plug-in the USB device, the serial port starts mal-functioning. It does not receive all the packets.
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Feb 21, 2009
On my CentOS 5.2 install I've installed a dual-port serial card based on the NetMOS 9835 chipset. I've followed the serial instructions, but everything they tell me to do is already done - see setserial outputs below. I've compared these values to the lspci output (below, NetMos card is at the bottom of the output) for the card and it appears right. Problem being, I can't use the serial ports. Oh and I did use search, and looked at every 9835-related article before posting this :)
[Code]....
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Oct 9, 2015
I am hoping to be able to get an old serial-touchscreen to work with a usb/serial adapter. I had this touchscreen working some years ago on different hardware. I would like to hook it to the machine I am setting up as a multimedia host with mythtv among other things.
Following the instructions I left behind when I got this to work way back when does not work. See [URL] ....
This info is a work around to get the xserver to see the touchscreen. [URL] ....
I do know that the touchscreen works as I am able to get garbage on the screen as in the first part of my howto. But I have not had any success getting xorg to see it. I wish I had posted a copy of the xorg.conf at the time, but......
There is an issue with the current xserver in testing that I am hoping the next update (in unstable) will fix when it gets pushed to testing. That is that Code: Select all# X -configure fails with a segfault. So I am not able to generate the xorg.conf needed to get it to work. I was going to post a bugreport, that is when I found out there is an update in unstable, so I am waiting for it to get pushed at the moment.
Anyway I am hoping that I can link /dev/ttyUSB0 to /dev/tty0 and get it to work. I would like some kind of guess as to my chances of success before I go to all the work of getting the monitor hooked to the host.
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Dec 18, 2009
I have an ATI Radeon 9600 video card on openSUSE 11.2 and I wish to enable 3D acceleration to get all the eye-candy working. As I understand it, fglrx will not work because ATI has relegated support of this video card to the legacy driver, which does not support the latest version of X. This leaves me to use the open source radeon driver. 3D acceleration works here, but when I move windows around I get lines on my screen suggesting something wrong with the refresh rate. Are there any modifications I can make to my xorg.conf file so that I can get acceptable performance with this video card, or am I relegated to using NVidia video cards?
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Sep 22, 2010
Now that the xorg.conf file seems to be a thing of the past, where do I put my serverlayout commands etc in order to get the serial touchscreen working? It responds to touchcal but doesn't work in normal use, so I presume it just needs X to be forced into loading it at startup.
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Jun 21, 2011
I have a bit of a dilemma. I'm attempting to use a microcontroller to send MIDI messages over a virtual serial port. I want to (eventually) read them with Mixxx. I'm using an FTDI chip, so I get a /dev/ttyUSB0. I've tried spikenzielabs' Serial-Midi program, but it doesn't see any serial ports. NOTEMIDI looks really old and won't compile on my 10.04 LTS machine.
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Mar 23, 2010
We have a new machine with RedHat enterprise 5 on it. I need to connect a serial cable to the serial port and talk to another system (old alpha system) instead of using a VT connected to the alpha.Does RedHat come with anything like Keaterm/hyperterm/etc etc?
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Oct 1, 2010
I am using a Prolific pl2303 USB<=>Serial adapter. dmesg reports everything seems ok when I plug it in (see below) but when I open the ttyUSB0 port in minicom, it is always offline and nothing works. Also, minicom reports:
[code]....
If I plug the adapter into a different machine (Windows) everything works fine. The serial port is setup correctly (9600-8-N-1) What can I do to get this working?
usb 5-2: new full speed USB device using uhci_hcd and address 3
usb 5-2: configuration #1 chosen from 1 choice
pl2303 5-2:1.0: pl2303 converter detected
usb 5-2: pl2303 converter now attached to ttyUSB0
usb 5-2: New USB device found, idVendor=067b, idProduct=2303
[Code]....
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Nov 29, 2009
I installed Opesuse 11.2 and I manged to install the Nvidia driver and it works fine. Then I enabled the Compiz and it works fine. During the Opensuse 11.2 installation I installed the XEN becuase I wanted to run multipile XEN guest, I have Nividi GeForce 9600 GT and I have 8 G of RAM and 1.5 TB.
When I decided to boot from XEN mode, it do not boot and it went to the terminal, I logged in I tried to install the Nivid driver in XEN mood and I wan in the init 3, it says:
The NVIDIA driver does not currently work on Xen kernels. If you are using a stock distribution kernel, please install a variant of this kernel without Xen support; if this is a
custom kernel, please install a standard Linux kernel. Then try installing the NVIDIA kernel module again.
I tried with the following Nvidia Driver;
After installing the above driver in normal kernel (non XEN kernel), it works fine but as soon as I boot to the XEN mode it just goes the terminal.
Kernel info:
The X11 fiel :
It must be some wrong with my installation or is there any patch for that.
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Jul 20, 2010
I have ubuntu on a Vaio VGN-A290 with the ATI Mobility Radeon 9600 M10 graphics card. I I installed the Eternal Lands client but it keeps crashing on me. Upon crashing a massage told me that I should make sure the video drivers are up to date. I then went into system --> Administration --> Hardware drivers and it says "no proprietary drivers are in use on this system." So my question is how do I install a driver for the ATI Mobility Radeon 9600 M10?
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